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Some quotations from "THE SCREWTAPE LETTERS by C. S. LEWIS Fellow of Magdalen College, Oxford TO J. R. R. TOLKIEN"
"PREFACE
I HAVE no intention of explaining how the correspondence which I now offer to the public fell into my hands.There are two equal and opposite errors into which our race can fall about the devils. One is to disbelieve in their existence. The other is to believe, and to feel an excessive and unhealthy interest in them. They themselves are equally pleased by both errors and hail a materialist or a magician with the same delight.

Letter number 1
Even if a particular train of thought can be twisted so as to end in our favour, you will find that you have been strengthening in your patient the fatal habit of attending to universal issues and withdrawing his attention from the stream of immediate sense experiences. Your business is to fix his attention on the stream. Teach him to call it "real life" and don't let him ask what he means by "real".
Letter number 2
Keep everything hazy in his mind now, and you will have all eternity wherein to amuse yourself by producing in him the peculiar kind of clarity which Hell affords.
Letter number 3
In civilised life domestic hatred usually expresses itself by saying things which would appear quite harmless on paper (the words are not offensive) but in such a voice, or at such a moment, that they are not far short of a blow in the face.
Letter number 4
At the very least, they can be persuaded that the bodily position makes no difference to their prayers; for they constantly forget, what you must always remember, that they are animals and that whatever their bodies do affects their souls. It is funny how mortals always picture us as putting things into their minds: in reality our best work is done by keeping things out.
Letter number 5
If, on the other hand, by steady and cool-headed application here and now you can finally secure his soul, he will then be yours forever—a brim-full living chalice of despair and horror and astonishment which you can raise to your lips as often as you please. So do not allow any temporary excitement to distract you from the real business of undermining faith and preventing the formation of virtues.
Letter number 6
Do what you will, there is going to be some benevolence, as well as some malice, in your patient's soul. The great thing is to direct the malice to his immediate neighbours whom he meets every day and to thrust his benevolence out to the remote circumference, to people he does not know. The malice thus becomes wholly real and the benevolence largely imaginary.
Letter number 7
If once we can produce our perfect work—the Materialist Magician, the man, not using, but veritably worshipping, what he vaguely calls "Forces" while denying the existence of "spirits"—then the end of the war will be in sight. But in the meantime we must obey our orders. I do not think you will have much difficulty in keeping the patient in the dark. The fact that "devils" are predominantly comic figures in the modern imagination will help you. If any faint suspicion of your existence begins to arise in his mind, suggest to him a picture of something in red tights, and persuade him that since he cannot believe in that (it is an old textbook method of confusing them) he therefore cannot believe in you."

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Summary of the video

File is some data or information which stays in the computer storage devise and has a name. There are different types of files and now we talk about text files. We learn how to open and read text files in Python:

1) Open and read the whole file in Python using file handle and build-in functions open() and read()

2) Open and read line by line some file in Python using for-loops

3) Open and read the whole file in Python using file handle and build-in functions open() and read() and interact with a user using the function input()

There are exercises at the end of the video: create a text file, call it screwtape, create some Python file and open the text file into the Python file using different ways.

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